TW201926111A - Method and apparatus for encrypting and decrypting product information - Google Patents

Abstract

Disclosed are a method and apparatus for encrypting and decrypting product information based on a block chain. Product information can be encrypted by a production side based on a unique secret code. When there is a circulation side, a circulation key may be unidirectionally generated according to the unique secret code, and the circulation side may continue to generate a circulation information encryption key, according to the circulation key, to encrypt the circulation information, and a next circulation key is generated according to the circulation information encryption key. That is, product information is encrypted by means of unidirectionally generating a key in a chained ring; and production information is encrypted and stored by using the characteristic that a unique secret code of a product cannot be learnt, other than by a production side and a purchaser, and the characteristic that a block chain cannot be tampered with and cannot be counterfeited, such that the production information has high confidentiality.

Description

Product information encryption and decryption method and device

This specification relates to the field of computer technology, in particular to a method and device for encrypting product information, and a method and device for decrypting product information.

At present, with the development of all walks of life, including the transaction and circulation of various online and offline products, the products mentioned here can be physical products, such as industrial products, handicrafts, etc .; or computer products, such as software, Network storage space, etc. For a product, there is usually a producer and a buyer, that is, the party that produces the product and the party that buys the product, and in many cases there is also a party that circulates, that is, one or more parties that circulate the product. For example, for a batch of beverage products, there can be a producer (the manufacturer of the beverage) and a buyer (consumer), or there is at least one distributor (agent, retailer, etc.) between the producer and the buyer ) In the entire circulation process, each party except the buyer will generate a product information for the product (the producer can produce production information, and the circulation party can produce circulation information), these information are connected together, it can be caused by The whole process from the producer to the buyer, that is, the product information is the basis for tracing the product. In general, it is necessary to keep the information of each product confidential, that is, the product information of each party can only be obtained by the producer and the buyer, and it needs to be kept secret from the circulation party or the stolen person. Therefore, it is necessary to provide a scheme for keeping confidential the product information generated by all parties, and ensure that the purchaser can trace the source of the product.

The embodiments of the present specification provide a method for encrypting and decrypting product information based on a blockchain, which is used to keep product information confidential during the process of product circulation and ensure that the purchaser can obtain product information. The embodiments of this specification provide a blockchain-based product information encryption and decryption device, which is used to keep product information confidential during product circulation and ensure that the purchaser can obtain product information. In order to solve the above technical problems, the embodiments of this specification are implemented as follows: The embodiments of this specification adopt the following technical solutions: A blockchain-based product information encryption method, which is applied to the producer, including: According to the uniqueness of the product Password, one-way production encryption key; According to the production encryption key, encrypt the production information of the product to generate production information encryption data; According to the production encryption key, produce production information query logo; will produce An information set is written into the blockchain, and the production information set includes production information query identifiers and production information encryption materials. A blockchain-based product information encryption method, which is applied to the circulation party, includes: One-way generation of the nth circulation key query mark based on the nth public key; Query identification based on the nth circulation key, from the block Read the nth received key encrypted data in the chain; Decrypt the nth circulation key encrypted data according to the nth private key to obtain the nth circulation key; According to the nth circulation key, generate unidirectionally The nth encryption key; According to the nth encryption key, encrypt the nth circulation information to generate the nth circulation information encrypted data; According to the nth encryption key, generate the nth circulation information query mark; The nth information The set is written into the blockchain, and the n-th information set includes the n-th circulation information query identifier and the n-th circulation information encrypted data;, where n is a natural number greater than 0. A method for decrypting product information based on blockchain. The method is applied to the purchaser and includes: One-way production encryption key is generated based on the product's unique password; Based on the production encryption key, production information query identifier is generated; according to The production information query identifier reads the production information encrypted material of the product from the blockchain; decrypts the production information encrypted material according to the production encryption key to obtain production information. A blockchain-based product information encryption device, applied to the producer, includes: a key generation unit, a data generation unit, an identification generation unit, and a data writing unit, where the key generation unit is based on the unique password of the product , One-way production encryption key; the data generation unit, according to the production encryption key, the production information of the product is encrypted to produce production information encryption data; the logo generation unit, based on the production encryption The key generates the production information query identifier; The data transmission unit writes the production information collection into the blockchain, and the production information collection includes the production information query identifier and the production information encryption material. A blockchain-based product information encryption device applied to a circulation party, including: an identification generation unit, a data reading unit, a data analysis unit, a key generation unit, a data encryption unit, and a data transmission unit, wherein the mark is generated Unit, according to the nth public key, unidirectionally generate the nth circulation key query mark; The data reading unit, according to the nth circulation key query mark, read the nth received key encrypted data from the blockchain; The data analysis unit decrypts the nth circulation key encrypted data based on the nth private key to obtain the nth circulation key; The key generation unit, based on the nth circulation key, unidirectionally Generate the nth encryption key; The data encryption unit encrypts the nth circulation information based on the nth encryption key to generate the nth circulation information encrypted data; Generates the nth circulation information based on the nth encryption key Query identifier; The data transmission unit writes the nth information set to the blockchain, the nth information set contains the nth circulation information query mark and the nth circulation information encrypted data;, where n is a natural number greater than 0 . A blockchain-based product information decryption device. The method is applied to a purchaser and includes: a key generation unit, an identification generation unit, a data reading unit, and a data analysis unit, wherein the key generation unit is based on The unique password of the product, which generates the production encryption key in one direction; The identification generation unit generates the production information query identification according to the production encryption key; The material reading unit queries the identification based on the production information Read the encrypted information of the production information of the product in the blockchain; The data analysis unit decrypts the encrypted information of the production information according to the production encryption key to obtain production information. An electronic device, comprising: a processor; and a memory arranged to store computer executable instructions, the executable instructions, when executed, cause the processor to perform the following operations: one-way production based on the unique password of the product Encryption key; According to the production encryption key, encrypt the production information of the product to generate production information encryption data; According to the production encryption key, generate production information query identifier; Write production information set to the block Chain, the production information set includes production information query identifiers and production information encryption materials. An electronic device comprising: a processor; and a memory arranged to store computer-executable instructions which, when executed, cause the processor to perform the following operations: according to the n-th public key n Circulation key query mark; According to the nth circulation key query mark, read the nth received key encrypted data from the blockchain; Decrypt the nth circulation key encrypted data based on the nth private key, Obtain the nth circulation key; According to the nth circulation key, unidirectionally generate the nth encryption key; According to the nth encryption key, encrypt the nth circulation information to generate the nth circulation information encrypted data; According to the Describe the nth encryption key to generate the nth circulation information query mark; write the nth information set into the blockchain, the nth information set contains the nth circulation information query mark and the nth circulation information encryption data; where, n It is a natural number greater than 0. An electronic device, comprising: a processor; and a memory arranged to store computer executable instructions, the executable instructions, when executed, cause the processor to perform the following operations: one-way production based on the unique password of the product Encryption key; According to the production encryption key, generate production information query identifier; According to the production information query identifier, read the production information encryption data of the product from the blockchain; According to the production encryption key, Decrypt the production information encrypted data to obtain production information. A computer-readable storage medium storing one or more programs, which when executed by an electronic device including multiple application programs, causes the electronic device to perform the following operations: According to the unique password of the product, the production encryption key is generated unidirectionally; according to the production encryption key, encrypting the production information of the product to generate production information encryption data; according to the production encryption key to generate production information query Logo; Write the production information set into the blockchain, the production information set contains the production information query logo, and production information encryption data. A computer-readable storage medium storing one or more programs, which when executed by an electronic device including multiple application programs, causes the electronic device to perform the following operations: According to the nth public key, generate the nth circulation key query identifier unidirectionally; According to the nth circulation key query identifier, read the nth received key encryption data from the blockchain; According to the nth private key, Decrypt the encrypted data of the nth circulation key to obtain the nth circulation key; according to the nth circulation key, unidirectionally generate the nth encryption key; encrypt the nth circulation information according to the nth encryption key, Generate the nth circulation information encrypted data; According to the nth encryption key, generate the nth circulation information query mark; Write the nth information set into the blockchain, the nth information set contains the nth circulation information query mark and The nth circulation information encrypted data; Among them, n is a natural number greater than 0. A computer-readable storage medium storing one or more programs, which when executed by an electronic device including multiple application programs, causes the electronic device to perform the following operations: Generate the production encryption key unidirectionally according to the unique password of the product; Generate the production information query identifier according to the production encryption key; Acquire the production information encryption of the product from the blockchain according to the production information query identifier Materials; Decrypt the production information encrypted materials according to the production encryption key to obtain production information. As can be seen from the technical solutions provided by the above embodiments, the embodiments provided in this specification can use the unique password of the product to generate a production encryption key in one direction, and then encrypt the production information of the product according to the production encryption key to produce production Information encryption data, according to the production encryption key, produce the production information query mark, and write the production information collection containing the production information query mark and the production information encryption material into the blockchain. The purchaser can use the unique password of the product to generate the production encryption key unidirectionally, and then generate the production information query mark according to the production encryption key, decrypt the production information encrypted data read from the blockchain, and obtain the production information. In the process of product circulation, if the circulation party occurs, the first circulation key for circulation to the first order circulation party can be generated unidirectionally according to the production encryption key, and the production information query logo can be generated unidirectionally. According to the first The public key encrypts the first circulation key to generate the first circulation key encrypted data. According to the first public key, the first circulation key query identifier is generated unidirectionally, which will include the first received key query identifier, The production information query mark, the first received key encrypted material, and the production information encrypted material production information set are written into the blockchain. The unique password of the product can only be known after the buyer destroys the integrity of the product, and the blockchain cannot be tampered with or forged. The production information is encrypted and decrypted, so that the production information is highly confidential and the production information is written. Into the blockchain, so that the next circulation party can write product information into the blockchain through continuous chain encryption.

In order to make the purpose, technical solutions and advantages of this description more clear, the technical solutions of this description will be described clearly and completely in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, but not all the embodiments. Based on the embodiments in this specification, other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the scope of protection of this specification. The technical solutions provided by the embodiments in this specification will be described in detail below in conjunction with the drawings. Example 1 As mentioned above, in the entire circulation process of a product, any party except the buyer will generate a product information for the product, for example, the manufacturer (product manufacturer) can generate a production information for the product during the production process (Can include characteristic information of the product, manufacturer, etc.), and the circulation party can generate a circulation information after receiving the product (may include the circulation party's time, price, address and other characteristic information), these information are concatenated together, can be The basis for tracing the product, tracing can refer to tracking the entire circulation process of a specific product from production, through intermediate links such as circulation, to the purchaser. For non-purchasers and producers (circulators and thieves), both need to keep product information confidential and ensure that the buyer can view the product information, so it is necessary to provide a scheme for keeping the product information generated by all parties confidential. , And ensure that the buyer can trace the source of the product. This manual provides a blockchain-based product information encryption and decryption method, used to keep product information confidential during product circulation and ensure that buyers can obtain product information. This method can be applied to the situation where there is a producer and a buyer in the circulation process, or it can be applied to the situation where there is a buyer, one or more circulation parties, and a buyer during the circulation process. In this embodiment 1, taking the case of a producer and a buyer as an example, a method of encrypting product information is introduced. Specifically, a product information encryption method based on blockchain is introduced first, which is applied to producers existing in producers and buyers. The flow of this method is shown in Figure 1. It includes the following steps: Step 12: Generate a production encryption key unidirectionally according to the product's unique password; Fang destroys the integrity of the product and can only find the unique password after starting to use the product. The meaning of the unique password of the product is that except for the manufacturer and the buyer, the unique password of the product cannot be obtained. For example, for bottled beverages, only when the cap is opened, that is, the integrity of the product is destroyed, can the unique code of the product be found from the inside of the cap. Therefore, as the producer, the unique password can be used as the basis to encrypt the product information, so that only the purchaser can find the unique password after starting to use it after destroying the integrity of the product. Specifically, the production encryption key can be generated for the unique password of the product through a one-way function, where the one-way function can refer to the calculation of the output for any input, but the input cannot be determined by the known output, or through the one-way function The hash function method generates the production encryption key for the unique password of the product. The one-way hash function, also known as the one-way hash function and hash function, is to change the input message string of any length into an output string of fixed length and It is difficult to get a function of the input string from the output string. Therefore, in the case where the unique password cannot be obtained, the production encryption key cannot be determined. Here the unique password can be represented by pincode, and the one-way function can be represented by hash, then the production encryption key generated unidirectionally according to the product unique password can be represented by key_{Production encryption} Said, you can have the key_{Production encryption} = hash (pincode) expression. In practical applications, in order to further strengthen the key_{Production encryption} In one embodiment, this step may include: receiving the production random number generated by the producer when producing the product; according to the combination of the unique password and the production random number, unidirectionally generating the production encryption key. Specifically, the producer can generate a production random number when producing the product. The production random number can be used for unidirectional calculation of the pincode, and the nonce can be used to generate the random number._produce Said. The combination of the unique password and the random number can be (pincode || nonce_produce ) Means that there can be a key_{Production encryption} = hash (pincode || nonce_produce ), It should be noted that the pincode and nonce referred to here_produce The combination can be a simple string of characters in series, that is, the pincode string is in front, nonce_produce After the character string, it can also be a preset character string interspersed in series, for example, pincode can have a 6-bit character string, and nonce_produce There can be a 4-bit character string, the default character string interspersed in series can be the first 3 bits of the pincode + nonce_produce First 2 digits + last 3 digits of pincode + nonce_produce The last two, wait. Step 14: According to the production encryption key, the production information of the product is encrypted to produce production information encrypted data. Due to the production encryption key generated in the previous step_{Production encryption} Need pincode support, but no one can get the pincode except the buyer, so this step can be based on the key_{Production encryption} Encrypt the production information of the product to produce encrypted information of the production information. Specifically, the production information may refer to the product information generated by the manufacturer when producing the product, where the product information can be represented by m, then the production information can be transmitted by m_produce Said. In practical applications, it is usually necessary to protect m_produce The privacy of can also be understood as protecting the privacy of the producer, so the production information is encrypted according to the pincode that is not known to the purchaser, and the security is very high. For encryption, it can be achieved through an encryption function. The encryption function enc can refer to a function that encrypts information. There are two inputs in the function, a key and information. After encryption, information encryption data can be generated (in this embodiment, the encrypted The information is the product information m), which can be represented by enc (encryption key key, product information m). However, for the information encryption data enc obtained, but the key is unknown, m cannot be parsed; for the enc and m obtained, the key cannot be known. If the key here is an asymmetric key, then enc is asymmetric encryption; If the key is a symmetric key, then enc is symmetric encryption. In the case of asymmetric encryption, there may be a public key pk and a private key sk. In this step, the encrypted data of production information can be expressed as enc (key_{Production encryption} , M_produce ). Has been introduced above, key_{Production encryption} It can be generated unidirectionally by pincode or pincode || nonce_produce Unidirectional generation, visible in joining nonce_produce Case, pincode and nonce_produce Is to get the key_{Production encryption} The key, and pincode can only be obtained by the purchaser, so in order to achieve protection nonce_produce For the purpose of this method, this method may also include: Generating a random number query identifier based on the unique password; creating a unique identifier for the product in the trusted repository; sending the random number query identifier and the production random number to the trusted repository, They are all associated with unique identifiers. Specifically, in order to achieve protection nonce_produce For the purpose, you can use the nonce_produce Sent to a trusted repository when the buyer needs to generate a key_{Production encryption} , And for enc (key_{Production encryption} , M_produce ) When decrypting, you can find the nonce from the trusted repository_produce . The trusted repository can be a highly secure national institution or enterprise. In the trusted repository, production random numbers for different products can be stored, so a unique identifier can be created for different products. For how to find the nonce_produce , According to the unique password, one-way random number query identifier hash (pincode), in the nonce_produce When sending to a trusted repository, you can hash (pincode) and nonce_produce Commonly sent to the trusted repository, and are all associated with a unique identifier, so that the buyer can find the nonce through the hash (pincode)_produce . While joining nonce_produce In the case of key_{Production encryption} = hash (pincode || nonce_produce ), For random number query identifier hash (pincode), it will not affect the key_{Production encryption} safety. According to the premise of this embodiment, in the process of product circulation, there are only producers and purchasers, in actual application, the producer can enc (key_{Production encryption} , M_produce ) Sent to the buyer for the buyer to resolve m_produce . Step 16: According to the production encryption key, generate the production information query identifier. Step 18: Write the production information set into the blockchain. The production information set may include the production information query identifier and the production information encryption material. Blockchain can be a chain data structure that combines data blocks in a chronological order in a sequential manner, and is a tamper-proof and unforgeable decentralized database guaranteed by cryptography. While enc (key_{Production encryption} , M_produce ) Write to the blockchain, which can effectively prevent tampering and forgery, and has high security and privacy. Because there are a lot of data in the blockchain, in order to enable the buyer to quickly find the enc (key_{Production encryption} , M_produce ), According to the key_{Production encryption} , To generate a production information query identifier, for example, it can be generated through a one-way function, or according to the key_{Production encryption} The number of digits in a specific character is generated, or it is generated in combination with the number of digits in a specific character and a one-way function, or a second one-way calculation is performed to produce a production information query identifier. Can include production information query identifier and enc (key_{Production encryption} , M_produce ) The production information set is written into the blockchain so that the buyer can read it. As shown in FIG. 2, it is a schematic diagram of one embodiment of the method; as shown in FIG. 3, it is a schematic diagram of another embodiment of the method, the difference is that in the embodiment shown in FIG. 3_{Production encryption} Join nonce_produce , More conducive to enc (key_{Production encryption} , M_produce ) For protection. It should be noted that in this embodiment and the following description, the "products" refer to the same product, that is, the product produced by the manufacturer. For example, the product in this specification may be "a batch of beverages" or " A 50GB network storage space ", around the product information, key, public key, private key, etc., all correspond to the same product. Using the method provided in Example 1, the manufacturer uses the unique password of the product to generate a production encryption key unidirectionally, and then encrypts the production information of the product according to the production encryption key, generates production information encryption data, and generates the production encryption key To generate a production information query identifier, and write the production information collection containing the production information query identifier and the encrypted information of the production information into the blockchain. The unique password of the product is not known except the producer and the buyer, and the blockchain cannot be tampered with or forged. The production information is encrypted and stored, making the production information highly confidential. In addition, the confidentiality of production information can be further enhanced by producing random numbers. Embodiment 2 Based on the same inventive idea as Embodiment 1, this embodiment takes the case where there are producers and purchasers in the circulation process as an example to introduce a blockchain-based product information encryption and decryption method, which is used in product circulation During the process, the product information is kept confidential and the purchaser can obtain the product information. Specifically, this embodiment introduces a method for decrypting product information based on a blockchain, which is applied to a buyer existing in a producer and a buyer. The flow of this method is shown in Fig. 4 and includes the following steps: Step 22: According to the unique password of the product, a production encryption key is generated unidirectionally. Has been introduced in Example 1, the producer can generate the key unidirectionally according to the pincode_{Production encryption} , There is a key_{Production encryption} = hash (pincode), also introduces the characteristics of pincode, that is, the buyer can find the pincode after destroying the integrity of the product and starting to use the product, so the buyer can also generate the key unidirectionally according to the pincode_{Production encryption} . Also introduced in Example 1, for further strengthening of the key_{Production encryption} Security, when the manufacturer produces a product, it can produce a nonce_produce , So in one embodiment, this step may include: generating a random number query identifier unidirectionally according to the product's unique password; obtaining a production random number corresponding to the random number query identifier from a trusted repository; based on the unique password and production The combination of random numbers generates the production encryption key in one direction. Specifically, join the nonce_produce In the case of key_{Production encryption} = hash (pincode || nonce_produce ), Because the producer generates a random number query identifier hash (pincode) according to pincode, and combines hash (pincode) and nonce_produce Commonly sent to a trusted repository, and all are associated with a unique identifier created for the product. Therefore, the buyer can also generate a hash (pincode) unidirectionally according to the pincode, and can find the nonce through the hash (pincode) in the trusted repository_produce , And then generate the key unidirectionally_{Production encryption} = hash (pincode || nonce_produce ), Introducing the nonce of pincode in Example 1_produce The combination of this step can be combined through the same combination in this step in order to generate the key_{Production encryption} The key generated by the producer_{Production encryption} Consistent. Step 24: According to the production encryption key, produce the production information query identifier. In the first embodiment, the method of generating the production information query mark is introduced. In this step, the purchaser can also generate the production information query mark by the producer to ensure consistency. Step 26: According to the production information query identifier, read the production production encrypted data of the product from the blockchain. In the embodiment, the producer will include the production information query identifier and enc (key_{Production encryption} , M_produce ) The production information set is written into the blockchain. In this step, the identifier can be queried according to the production information, and the enc (key_{Production encryption} , M_produce ). Step 28: According to the production encryption key, decrypt the encrypted information of the production information to obtain the production information. In this step, according to the characteristics of the encryption function, you can_{Production encryption} , For enc (key_{Production encryption} , M_produce ) To decrypt and get m_produce . Because the buyer is destroying the integrity of the product, the pincode can only be found after starting to use the product. Even if the theft party gets the enc (key_{Production encryption} , M_produce ), Because of the inability to know the pincode, it cannot be decrypted, if you add nonce_produce Situation, because the pincode cannot be known, the hash (pincode) cannot be known, and the key cannot be determined._{Production encryption} = hash (pincode || nonce_produce ). Is shown in FIG. 5 as a schematic diagram of one embodiment of the method; as shown in FIG. 6 is a schematic diagram of another embodiment of the method, the difference is that in the embodiment shown in FIG. 6_{Production encryption} Join nonce_produce , Added resolution m_produce Difficulty. Using the method provided in Example 2, the purchaser uses the unique password of the product to generate a production encryption key unidirectionally, and then generates a production information query identifier according to the production encryption key, and performs encryption on the production information read from the blockchain Decrypt to obtain production information. The unique password of the product can only be known after the buyer destroys the integrity of the product, and the blockchain cannot be tampered with or forged. The production information is decrypted, making the production information highly confidential. In addition, the confidentiality of production information can be further enhanced by producing random numbers. Embodiment 3 In the foregoing two embodiments, it has been introduced that there are producers and buyers in the circulation process, and in practical applications, there may also be one or more circulation parties, which can make the product convenient From the producer to the buyer, such as agents, wholesalers, retailers, etc. The circulation party also generates circulation information for the product during the circulation process, and the circulation information can contain the circulation party's privacy information, so it also needs to be kept confidential, that is, for other circulation parties and stolen, the product information Keep it confidential and ensure that the purchaser can view the product information, and other circulation parties cannot obtain the production information and the circulation information of other circulation parties. Therefore, based on the same inventive ideas as the previous two embodiments, this embodiment takes a case where there are producers, distributors, and purchasers in the circulation process as an example to introduce a method for encrypting and decrypting product information based on blockchain, specifically , First introduces a method of encryption of product information based on blockchain, which is applied to producers among producers, distributors and purchasers. The flow of this method is shown in FIG. 7 and includes the following steps: Step 32: unidirectionally generate a production encryption key based on the product's unique password; Step 34: encrypt the production information of the product based on the production encryption key, Produce encrypted information of production information. The first two steps are similar to Embodiment 1, and are not repeated here. The enc (key can be generated according to the implementation shown in FIG. 2 or FIG. 3_{Production encryption} , M_produce ). Step 36: According to the production encryption key, unidirectionally generate the first circulation key, and then according to the first circulation key, unidirectionally generate the production information query mark. The first circulation key mentioned here can be used to circulate the first order circulation party. For example, if the wholesaler is the first circulation party after the producer, then the wholesaler can refer to the first order circulation party. Taking into account the characteristics of pincode, that is, the producer and the buyer who destroys the integrity of the product can be informed, you can use pincode as the basis to continuously generate encryption keys in the chain during the circulation process. Specifically, the characteristics of the one-way function can be used, that is, the characteristic that the result cannot be reversely analyzed, and the first circulation key can be generated unidirectionally according to the production encryption key. The first circulation key can be key_{First 1 Circulation} Said. Has been introduced in Example 1, you can write encrypted information to the blockchain, the buyer can use the key_{Production encryption} Generate production information query identifier, and facilitate reading enc (key_{Production encryption} , M_produce ). However, for the circulation party, in order to achieve the purpose of keeping the production information confidential, it is not necessary for the circulation party to obtain the key_{Production encryption} , But the circulation party also needs to read the data in the blockchain, so it can also generate a production information query identifier for the circulation party, and avoid the key_{Production encryption} Directly generated, that is, according to the key_{First 1 Circulation} , A one-way production information query identifier can be expressed as hash (key_{First 1 Circulation} ). Step 38: Encrypt the first circulation key according to the first public key to generate the first circulation key encrypted data. The first public key is the circulation public key of the first order circulation party. Because it is a key_{First 1 Circulation} By key_{Production encryption} Generated, and key_{First 1 Circulation} It can also act on the first-order circulation party to circulate. You can consider letting the first-order circulation party know the key_{First 1 Circulation} , But the key cannot be obtained_{Production encryption} , So you can pair the key with the first public key_{First 1 Circulation} Encrypted, the first public key can be expressed as pk₁ , May refer to the circulation public key of the first order circulation party. Specifically, using the pk of the first order distributor₁ Pair key_{First 1 Circulation} Encryption can generate the first circulation key encrypted data enc (pk₁ , Key_{First 1 Circulation} ). So that the first order circulation party can use the first private key sk₁ To decrypt. In practical applications, in order to further protect the privacy of the product circulation process, you can generate enc (pk₁ , Key_{First 1 Circulation} ), The product ’s public clear code is added. In one embodiment, this step may include: encrypting the combination of the product ’s public clear code and the first circulation key according to the first public key to generate the first circulation key Encrypt data. The publicly available qcode can be external to the product and unique in the whole area. After receiving the product, either party can obtain the qcode, but it is not easy to obtain for any object that has not received the product (such as a stealer, but it can also be stolen through abnormal means ), So qcode can be added to the circulation process to further enhance the privacy of circulation. Specifically, there can be enc (pk₁ , Qcode || key_{First 1 Circulation} ). Step 310: According to the first public key, unidirectionally generate the first circulation key query identifier. In the previous step, enc (pk₁ , Key_{First 1 Circulation} ), And in order to ensure the security of the data, this method can also write the information set to the blockchain, so in order to make the first circulation party find enc (pk₁ , Key_{First 1 Circulation} ), Can generate a one-way key query identifier for the circulation party, that is, the first circulation key query identifier, which can be expressed as hash (pk₁ ) So that the first circulation can pass through pk₁ Read from the blockchain to enc (pk₁ , Key_{First 1 Circulation} ). Step 312: Write the production information set into the blockchain. The production information set may include the first received key query identifier, the production information query identifier, the first received key encrypted data, and the production information encrypted data. This step can write production information to the blockchain (uplink), so that the circulation and purchasers can obtain enc (pk₁ , Key_{First 1 Circulation} ) And enc (key_{Production encryption} , M_produce ), For how to find, you can use hash (pk₁ ), And hash (key_{First 1 Circulation} ). In practical applications, in order to further enhance privacy, this step may include: signing the production information set according to the production private key, which is the private key generated by the producer when producing the product; the signed production information The collection is written to the blockchain. As shown in FIG. 8, it is a schematic diagram of an embodiment of the method. Using the method provided in Embodiment 3, on the basis of Embodiment 1, based on the production encryption key, unidirectionally generate the first circulation key for circulation to the first order circulation party, and then unidirectionally generate the production information query identifier, According to the first public key, the first circulation key is encrypted to generate the first circulation key encrypted data, and according to the first public key, the first circulation key query identifier is generated unidirectionally, which will contain the first receiving key The query identifier, the production information query identifier, the first received key encrypted data, and the production information encrypted data The production information set is written into the blockchain. The unique password of the product can only be known after the buyer destroys the integrity of the product, and the blockchain cannot be tampered with or forged. The production information is encrypted, so that the production information is highly confidential and the production information is written. The blockchain allows the next circulation party to write product information into the blockchain through continuous chain encryption. Embodiment 4 Based on the same inventive ideas as the previous two embodiments, this embodiment introduces a case where there are producers, distributors, and purchasers in the circulation process as an example to introduce a method for encrypting and decrypting product information based on blockchain Specifically, an encryption method of product information based on blockchain is introduced, which is applied to the circulators among the producer, circulator, and purchaser. The flow of the method is shown in FIG. 9 and includes the following steps: Step 42: According to the nth public key, generate the nth circulation key query identifier unidirectionally. In Example 3, the role of the public key of the circulation party is introduced. This step can be based on pk_n , One-way generation of the nth circulation key query identifier hash (pk_n ), Where n can be a natural number greater than 0, such as 1, 2, 3, 4 ... etc. Step 44: According to the nth circulation key query identifier, read the nth received key encrypted data from the blockchain. As shown in Figure 8, when writing production information sets to the blockchain, the first order circulation party can use the hash (pk₁ ), Find enc (pk₁ , Key_{First 1 Circulation} ), Similarly, the nth order circulation party can use hash (pk_n ), Find enc (pk_n , Key_{First n Circulation} ). It has been introduced in Embodiment 3, and it can be used to sign the production information set in practical application. For the circulation party, there can be multiple circulation parties, and each circulation party signs with its own private key, so after this step , May also include: performing signature verification on the signed production information set according to the production public key; or performing signature verification on the signed nth information set according to the nth public key. When the verification is successful, perform the next step. Step 46: Decrypt the n-th circulation key encrypted data according to the n-th private key to obtain the n-th circulation key. Has been introduced in Embodiment 3, the first order circulation party can use the first private key sk₁ For enc (pk₁ , Key_{First 1 Circulation} ) Decryption, similarly, in this step, you can also use the nth private key sk_n For enc (pk_n , Key_{First n Circulation} ) To decrypt. Step 48: According to the nth circulation key, generate the nth encryption key unidirectionally. In Example 3 (refer to Example 1), according to the pincode of the product, the key is generated unidirectionally_{Production encryption} However, as the circulation party cannot obtain the pincode, and the encryption method provided in this manual can continuously generate the encryption key for the pincode chain as the core, so in this step, the circulation party_{First n Circulation} , Generate key unidirectionally_{First n encryption} , Associated with the producer, that is, the producer can generate the key according to the pincode_{Production encryption} , And each circulation chain continuously generates keys_{First 1 encryption} , Key_{First 2 encryption} , Key_{First 3 encryption} Etc. ie key_{First n encryption} = hash (key_{First n Circulation} ). In practical applications, in order to further enhance privacy, it may be similar to the producer, and the circulation party may also generate a random number, so in one embodiment, this step may include: receiving the nth order circulation party generates when receiving the product Random number of the nth; according to the combination of the nth circulation key and the nth random number, the nth encryption key is generated unidirectionally. Specifically, there can be a key_{First n encryption} = hash (key_{First n Circulation} || nonce_{First n} ). Similar to Embodiment 1, this step may also include: sending the nth random number to the trusted storage and associated with the unique identifier of the product, so that the purchaser can find the random number of each circulation party through the unique identifier of the product , And other circulation parties, because they cannot know the pincode, they cannot obtain the random numbers of other circulation parties. Step 410: Encrypt the nth circulation information according to the nth encryption key, and generate the nth circulation information encrypted data. The producer can produce a production information m_produce , Then the circulation party can generate its own circulation information in the circulation process m_{First n} , For example, the first order circulation party can produce m_{First 1} , The first order circulation party can produce m_{First 2} ,Wait. Thus this step can be based on the key_{First n encryption} To m_{First n} Encrypt to generate enc (key_{First n encryption} , M_{First n} ). Step 412: According to the nth encryption key, generate the nth circulation information query mark. Has been introduced in Embodiment 1, the way to generate the information query identifier, in this step, it can also_{First n encryption} Generate the nth circulation information query mark. In practical applications, there may be a next circulation party, similar to step 36 in Embodiment 3, this step may further include: generating the n + 1th circulation key unidirectionally according to the nth encryption key, and then According to the n + 1th circulation key, the nth circulation information query mark is generated unidirectionally. The n + 1th circulation key may be the next order circulation party relative to the nth order circulation party. Key_{First n + 1 Circulation} = hash (key_{First n Circulation} ), The nth circulation information query identifier can be hash (key_{First n + 1 Circulation} ), So that the n + 1th order circulation party can follow the hash (key_{First n + 1 Circulation} ), Read the data in the blockchain. Step 414: Write the nth information set into the blockchain, the nth information set contains the nth circulation information query mark and the nth circulation information encrypted data. As shown in Figure 2 or 3, this step can similarly include the nth circulation information query mark and enc (key_{First n encryption} , M_{First n} ) The nth information set is written into the blockchain. In the case where there is a next circulation party, this step may include encrypting the n + 1th circulation key according to the n + 1th public key to generate n + 1th circulation key encrypted data, the n + 1th public key The key can be the circulation public key of the n + 1th circulation party; according to the n + 1th public key, the n + 1th circulation key query identifier is generated unidirectionally; the nth information set is written into the blockchain, the nth The information set includes the n + 1th received key query mark, the nth circulation information query mark, the n + 1th reception key encrypted data, and the nth circulation information encrypted data. Specifically, it may be similar to the foregoing, may be based on pk_{n + 1} , For key_{First n + 1 Circulation} Encrypt to generate enc (pk_{n + 1} , Key_{First n + 1 Circulation} ), Generate hash (pk_{n + 1} ) As the n + 1th circulation key query identifier. Will contain hash (pk_{n + 1} ), Hash (key_{First n + 1 Circulation} ), Enc (pk_{n + 1} , Key_{First n + 1 Circulation} ), And enc (key_{First n encryption} , M_{First n} ) The nth information set is written into the blockchain. In practice, according to the n + 1th public key, the n + 1th circulation key is encrypted to generate the n + 1th circulation key encryption data, which may include: According to the n + 1th public key, the Encrypt the combination of the public clear code and the n + 1th circulation key to generate the n + 1th circulation key encrypted data, that is, there can be enc (pk_{n + 1} , Qcode || key_{First n + 1 Circulation} ). In practical applications, similar to the foregoing, the nth information set can be signed based on the nth private key; the signed nth information set is written into the blockchain so that the next circulation party can Signature verification. As shown in FIG. 10, it is a schematic diagram of this embodiment. Using the method of Embodiment 4, on the basis of the producer of Embodiment 3, the nth circulation key is parsed based on the nth private key, which will eventually include the n + 1th received key query identifier and the nth circulation information query The nth information set of the logo, the n + 1th received key encrypted data, and the nth circulating information encrypted data is written into the blockchain. The unique password of the product can only be known after the buyer destroys the integrity of the product, and the blockchain cannot be tampered with or forged. The nth circulation information is encrypted, so that the nth circulation information has high confidentiality and will be The nth circulation information is written into the blockchain, so that the next circulation party can write product information into the blockchain through continuous chain encryption. If there is no next circulation party, the nth information set including the nth circulation information query mark and the nth circulation information encrypted data can also be written into the blockchain. Embodiment 5 Based on the same inventive idea as the previous embodiment, this embodiment takes a case where there are producers, distributors and purchasers in the circulation process as an example to introduce a blockchain-based product information encryption and decryption method, specifically ， Introduce a method of encryption of product information based on blockchain, which is applied to buyers who exist in producers, distributors and buyers. The flow of the method is shown in FIG. 11 and includes the following steps: Step 52: According to the unique password of the product, a production encryption key is generated unidirectionally. Step 54: According to the production encryption key, produce the production information query identifier. Step 56: According to the production information query identifier, read the production information encrypted data of the product from the blockchain. In an embodiment, this step may include: According to the combination of the unique password and the production random number, unidirectionally generate the production encryption key, then unidirectionally generate the first circulation key, and unidirectionally generate the production information query identifier; according to the production Information query identification, read the production information encrypted data in the production information collection from the blockchain. Specifically, a random number combination can be added in this step, that is, there can be a key_{Production encryption} = hash (pincode || nonce_produce ), Key_{First 1 Circulation} = hash (key_{Production encryption} ), A one-way production information query identifier hash (key_{First 1 Circulation} ), So that the enc (key in the production information set can be read from the blockchain_{Production encryption} , M_produce ). Step 58: According to the production encryption key, decrypt the encrypted information of the production information to obtain the production information. The above steps are similar to the implementation described in Embodiment 2, and will not be repeated here. Step 510: Generate the first circulation key unidirectionally according to the production encryption key, generate the nth encryption key unidirectionally according to the nth circulation key, and generate the n + 1th circulation key unidirectionally according to the nth encryption key key. Purchaser can according to key_{Production encryption} Unidirectional key generation_{First 1 Circulation} . Key_{First 1 Circulation} = hash (key_{Production encryption} ). According to the chain continuous generation method, according to the key_{First n Circulation} Generate key_{First n encryption} , As already mentioned above, random numbers can be added when generating encryption keys, so according to the nth circulation key, the nth encryption key can be generated unidirectionally, which can include: obtaining from a trusted repository and random number query The nth random number corresponding to the key; the nth encryption key is generated unidirectionally based on the combination of the nth circulation key and the nth random number. Specifically, since the purchaser learns the pincode, it can generate a random number query key hash (pincode) in one direction. According to the introduction of the foregoing embodiment, both the producer and the circulator can send the random number to the trusted repository. And it can be associated with the unique identifier of the product, that is, the unique identifier can be associated with hash (pincode), production random number, and nth random number. At this time, the trusted repository can be set to only allow the random number to be associated through the unique identifier. It cannot be read, but the hash (pincode) can be read, which effectively prevents the circulation party from obtaining the random number through the unique identifier. After the buyer obtains the corresponding nth random number (including the 1st random number, the 2nd random number ... the nth random number) through the hash (pincode), it can unidirectionally generate the nth encryption key, which can have a key_{First n encryption} = hash (key_{First n Circulation} || nonce_{First n} ). For the circulation key, the n + 1th circulation key can be generated unidirectionally according to the nth encryption key, which can have a key_{First n + 1 Circulation} = hash (key_{First n encryption} ). For example, the buyer generated the key in step 52_{Production encryption} , Then this step can have key_{First 1 Circulation} = hash (key_{Production encryption} ), Can then generate the key_{First 1 encryption} = hash (key_{First 1 Circulation} || nonce_{First 1} ), And can also generate key_{First 2 Circulation} = hash (key_{First 1 encryption} ), So back and forth, you can get all the circulation key of the circulation party. In this embodiment, n may be a natural number greater than 0. Step 512: According to the nth circulation information query mark, read the nth circulation information encrypted data of the product from the blockchain. For the last circulation party, you can generate the nth circulation information query identifier according to the nth encryption key, according to a preset method, such as the method described in step 18 in Embodiment 1, according to the key_{First n encryption} The number of characters in a specific character is generated, or it is generated in combination with the number of characters in a specific character and a one-way function, or a second one-way calculation is performed to generate the nth circulation information query identifier. For the non-last circulation party, this step may include: according to the combination of the nth circulation key and the nth random number, unidirectionally generate the nth encryption key, and then unidirectionally generate the n + 1th circulation The key, and then generate the nth circulation information query mark unidirectionally; according to the nth circulation information query mark, read the enc (key in the nth information set from the blockchain_{First n encryption} , M_{First n} ). Specifically, there can be a key_{First n encryption} = hash (key_{First n Circulation} || nonce_{First n} ), Key_{First n + 1 Circulation} = hash (key_{First n encryption} ), The nth circulation information query identifier hash (key_{First n + 1 Circulation} ). As shown in Figure 10, according to hash (key_{First n + 1 Circulation} ), Read enc (key from the blockchain_{First n encryption} , M_{First n} ). Step 514: Decrypt the nth circulation information encrypted data according to the nth encryption key to obtain the nth circulation information. Specifically, it can be similar to the introduction of Embodiment 2, according to the key_{First n encryption} , For enc (key_{First n encryption} , M_{First n} ) Decrypt and get m_{First n} . FIG. 12 is a schematic diagram of this embodiment. Using the method provided in Example 5, the purchaser uses the unique password of the product to generate a production encryption key in one direction, and then generates a production information query identifier according to the production encryption key, and performs encryption on the production information read from the blockchain Decrypt to obtain production information. Through the chain continuous encryption method, according to the production encryption key, the first circulation key is generated, and then the first encryption key is generated, thereby continuously generating the nth encryption key, and then generating the n + 1th circulation key, the nth The information query mark, and then decrypt the nth circulation information encrypted data obtained according to the nth information query mark according to the nth encryption key to obtain the nth circulation information. Embodiment 6 Based on the same inventive concept, Embodiment 6 provides a blockchain-based product information encryption device, which can be applied to the producer to implement the methods described in Embodiment 1 and Embodiment 3. The block diagram of the device is shown in FIG. 13, which is a block diagram of the device, including: key generation unit 61, data generation unit 62, identification generation unit 63, data writing unit 64, wherein the key generation Unit 61 can generate the production encryption key unidirectionally according to the unique password of the product; The data generation unit 62 can encrypt the production information of the product according to the production encryption key to generate the production information encrypted data; The identifier generating unit 63 can generate a production information query identifier according to the production encryption key; The data transmission unit 64 can write the production information collection to the blockchain, and the production information collection includes the production information query identifier , And production information encryption data. In one embodiment, the key generation unit 61 can receive the production random number generated by the manufacturer when producing the product; according to the combination of the unique password and the production random number, unidirectionally generate a production encryption password key. In one embodiment, the identification generating unit 63 can generate a random number query ID according to the unique password; the data transmission unit 64 can create a unique ID for the product in a trusted repository; The random number query identifier and the production random number are sent to the trusted repository, and are all associated with the unique identifier. In one embodiment, the identification generating unit 63 may unidirectionally generate the first circulation key according to the production encryption key, and then unidirectionally generate the production information query identifier based on the first circulation key; then The data generating unit 62 may encrypt the first circulation key based on the first public key to generate the first circulation key encrypted data, and the first public key is the circulation public key of the first order circulation party; based The first public key generates the first circulation key query identifier in one direction; The data transmission unit 64 can write the production information set into the blockchain, the production information set includes the first received key query identifier, Production information query mark, the first receiving key encryption material and production information encryption material. In one embodiment, the data generating unit 62 encrypts the combination of the product's public clear code and the first circulation key based on the first public key to generate the first circulation key encrypted data. In one embodiment, the data transmission unit 64 may sign the production information set according to a production private key, which is the private key generated by the producer when producing the product; The production information set is written into the blockchain. Embodiment 7 Based on the same inventive concept, Embodiment 7 provides a blockchain-based product information encryption device, which can be applied to a circulation party to implement the method described in Embodiment 4. The structural block diagram of the device is shown in FIG. 14, which is a structural diagram of the device, including: ID generation unit 71, data reading unit 72, data analysis unit 73, key generation unit 74, data encryption unit 75, data transmission Unit 76, wherein, the identification generating unit 71 can generate the nth circulation key query mark unidirectionally based on the nth public key; the material reading unit 72 can query the mark based on the nth circulation key, from the zone Read the nth received key encrypted data in the blockchain; The data analysis unit 73 can decrypt the nth circulation key encrypted data according to the nth private key to obtain the nth circulation key; The secret The key generating unit 74 can unidirectionally generate the nth encryption key according to the nth circulation key; The data encryption unit 75 can encrypt the nth circulation information according to the nth encryption key to generate the nth Circulation information encryption data; Generate the nth circulation information query mark according to the nth encryption key; The data transmission unit 76 can write the nth information set into the blockchain, the nth information set contains the nth Circulation information query mark and nth circulation information encrypted data; Among them, n is a natural number greater than 0. In one embodiment, the key generation unit 74 may receive the nth random number generated by the nth order circulation party when receiving the product; According to the combination of the nth circulation key and the nth random number, Generate the nth encryption key unidirectionally. In one embodiment, the data transmission unit 76 may send the nth random number to a trusted storage and associate it with the unique identifier of the product. In an embodiment, the identification generating unit 71 may generate the n + 1th circulation key unidirectionally according to the nth encryption key, and then generate the nth circulation unidirectionally according to the n + 1th circulation key Information query identifier; then the key generation unit 74 may encrypt the n + 1th circulation key according to the n + 1th public key to generate the n + 1th circulation key encrypted data, the n + 1th The public key is the circulation public key of the n + 1th order circulation party; The identification generation unit 71 can unidirectionally generate the n + 1th circulation key query identifier based on the n + 1th public key; The data transmission unit 76 , The nth information set can be written into the blockchain, the nth information set includes the n + 1th received key query identifier, the nth circulation information query identifier, the n + 1th received key encrypted data, and the n Encrypted information of circulation information. In an embodiment, the data encryption unit 75 may encrypt the combination of the product's public clear code and the n + 1th circulation key according to the n + 1th public key to generate the n + 1th circulation key encrypted data . In one embodiment, the data transmission unit 76 may sign the nth information set based on the nth private key; write the signed nth information set into the blockchain. In an embodiment, the data analysis unit 73 may perform signature verification on the signed production information set based on the production public key before decrypting the nth circulation key encrypted data according to the nth private key; Or, according to the nth public key, perform signature verification on the signed nth information set. Embodiment 8 Based on the same inventive concept, Embodiment 8 provides a blockchain-based product information decryption device that can be applied to the purchaser to implement the methods described in Embodiments 3 and 5. The structure block diagram of the device is shown in FIG. 15, which is a structure diagram of the device, including: key generation unit 81, identification generation unit 82, data reading unit 83, and data analysis unit 84, wherein the key The generating unit 81 can generate the production encryption key unidirectionally according to the unique password of the product; The identification generating unit 82 can generate the production information query identification based on the production encryption key; The material reading unit 83 can Read the production information encrypted data of the product from the blockchain according to the production information query identifier; the data analysis unit 84 may decrypt the production information encrypted data according to the production encryption key, Obtain production information. In one embodiment, the key generation unit 81 may unidirectionally generate a first circulation key based on the production encryption key, and unidirectionally generate an nth encryption key based on the nth circulation key, According to the nth encryption key, generate the n + 1th circulation key in one direction; The data reading unit 83 can query the mark based on the nth circulation information to read the nth circulation of the product from the blockchain Circulation information encrypted data; The data analysis unit 84 can decrypt the nth circulation information encrypted data according to the nth encryption key to obtain the nth circulation information;, where n is a natural number greater than 0. In one embodiment, the key generation unit 81 can generate a random number query identifier in one direction according to the unique password of the product; the data reading unit 83 can obtain the random number from the trusted storage Query the production random number corresponding to the identification; The key generation unit 81 can unidirectionally generate a production encryption key according to the combination of the unique password and the production random number. In one embodiment, the data reading unit 83 obtains the nth random number corresponding to the random number query key from a trusted storage; the key generation unit 81 circulates according to the nth The combination of the key and the nth random number generates the nth encryption key in one direction, where n is a natural number greater than 0. In one embodiment, the key generation unit 81 generates a production encryption key unidirectionally according to the combination of the unique password and the production random number, then unidirectionally generates the first circulation key, and then unidirectionally generates Production information query mark; The data reading unit 83 reads the production information encrypted data in the production information set from the blockchain according to the production information query mark; then the key generation unit 81 according to the The combination of the nth circulation key and the nth random number generates the nth encryption key in one direction, then generates the n + 1th circulation key in one direction, and then generates the nth circulation information query mark in one direction; The data The reading unit 83 reads the nth circulation information encrypted data in the nth information set from the blockchain based on the nth circulation information query identifier. FIG. 16 is a schematic structural diagram of an electronic device according to an embodiment of this specification. At the hardware level, the electronic device includes a processor, and optionally also includes an internal bus, network interface, and memory. The memory may include memory, such as high-speed random access memory (Random-Access Memory, RAM), or may also include non-volatile memory (non-volatile memory), such as at least one disk memory Wait. Of course, the electronic device may also include hardware required by other businesses. The processor, network interface and memory can be connected to each other through an internal bus. The internal bus can be an ISA (Industry Standard Architecture) bus and a PCI (Peripheral Component Interconnect) bus Or EISA (Extended Industry Standard Architecture) bus. The bus can be divided into an address bus, a data bus, and a control bus. For ease of representation, only one bidirectional arrow is used in FIG. 16, but it does not mean that there is only one bus bar or one type of bus bar. Memory, used to store programs. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory may include memory and non-volatile memory, and provide instructions and data to the processor. The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it, forming a drawing device of the information dialog box in the conversation window at a logical level. The processor executes the program stored in the memory and is specifically used to perform the following operations: Generate a production encryption key unidirectionally according to the product's unique password; Encrypt the production information of the product according to the production encryption key , Generate encrypted information of production information; Generate production information query identifier according to the production encryption key; Write production information collection to the blockchain, the production information collection contains production information query identifier, and production information encrypted data. It can also be used to perform the following operations: Generate the nth circulation key query identifier unidirectionally according to the nth public key; According to the nth circulation key query identifier, read the nth received key encrypted data from the blockchain; according to The nth private key decrypts the nth circulation key encrypted data to obtain the nth circulation key; according to the nth circulation key, unidirectionally generates the nth encryption key; according to the nth encryption key, Encrypt the nth circulation information to generate the nth circulation information encrypted data; According to the nth encryption key, generate the nth circulation information query mark; Write the nth information set to the blockchain, the nth information set Contains the nth circulation information query mark and the nth circulation information encrypted data; Among them, n is a natural number greater than 0. It can also be used to perform the following operations: Generate a production encryption key unidirectionally based on the product's unique password; Generate a production information query identifier based on the production encryption key; Acquire the production information query identifier from the blockchain Obtain the production information encrypted material of the product; According to the production encryption key, decrypt the production information encrypted material to obtain production information. The method performed by the service feedback apparatus provided in the embodiment shown in FIG. 16 of the present specification may be applied to a processor, or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by instructions in the form of hardware integrated logic circuits or software in the processor. The foregoing processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc .; or a digital signal processor (Digital Signal Processor, DSP), dedicated Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present specification can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may be any common processor. The steps of the method disclosed in conjunction with the embodiments of the present specification may be directly implemented and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module may be located in a random storage memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a temporary memory, and other mature storage media in the art. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method. The electronic device can also execute the method performed by the device for encrypting and decrypting product information based on the blockchain in FIGS. 13 to 15 and implement the function of the device for encrypting and decrypting product information based on the blockchain in the embodiment shown in FIG. The embodiments of this specification will not be repeated here. The embodiment of the present specification also proposes a computer-readable storage medium storing one or more programs, the one or more programs including instructions, which are executed by an electronic device including a plurality of application programs It can enable the electronic device to execute the method performed by the service feedback device in the embodiment shown in FIG. 16, and is specifically used to perform: one-way generation of the production encryption key according to the unique password of the product; according to the production encryption key, The production information of the product is encrypted to produce encrypted information of production information; Generates the production information query identifier according to the production encryption key; Writes the production information collection to the blockchain, the production information collection includes the production information query identifier, And encrypted information of production information. It can also be used to execute: Generate the nth circulation key query identifier unidirectionally according to the nth public key; According to the nth circulation key query identifier, read the nth received key encrypted data from the blockchain; according to the nth Private key, decrypt the encrypted data of the nth circulation key to obtain the nth circulation key; according to the nth circulation key, unidirectionally generate the nth encryption key; according to the nth encryption key, n Circulation information is encrypted to generate the nth circulation information encrypted data; According to the nth encryption key, generating the nth circulation information query mark; Write the nth information set to the blockchain, the nth information set contains the n Circulation information query mark and nth circulation information encrypted data; Among them, n is a natural number greater than 0. It can also be used to execute: Generate a production encryption key unidirectionally according to the product's unique password; Generate a production information query identifier based on the production encryption key; Acquire the production information query identifier based on the production information Encryption information of production information of the product; decrypts the encryption information of production information according to the production encryption key to obtain production information. The system, device, module or unit explained in the above embodiments can be realized by a computer chip or entity, or by a product with a certain function. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, and a wearable device Or any combination of these devices. For the convenience of description, when describing the above devices, the functions are divided into various units and described separately. Of course, when implementing this specification, the functions of each unit can be implemented in the same software or multiple hardware and / or hardware. Those skilled in the art should understand that the embodiments of this specification can be provided as methods, systems, or computer program products. Therefore, this specification may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, this manual can take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) containing computer-usable program code . This specification is described with reference to the flowcharts and / or block diagrams of the method, device (system), and computer program product according to the embodiments of this specification. It should be understood that each flow and / or block in the flowchart and / or block diagram and a combination of the flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing equipment to produce a machine that enables the generation of instructions executed by the processor of the computer or other programmable data processing equipment A device for realizing the functions specified in one block or multiple blocks in one flow or multiple flows in a flowchart and / or one block in a block diagram. These computer program instructions can also be stored in a computer readable memory that can guide the computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including an instruction device, The instruction device implements the functions specified in one block or multiple blocks in one flow or multiple flows in the flowchart and / or one block in the block diagram. These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operating steps can be performed on the computer or other programmable device to generate computer-implemented processing, which can be executed on the computer or other programmable device The instructions provide steps for implementing the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and / or block diagrams. In a typical configuration, the computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory. Memory may include non-permanent memory, random access memory (RAM) and / or non-volatile memory in computer-readable media, such as read-only memory (ROM) or flash memory ( flash RAM). Memory is an example of computer-readable media. Computer-readable media, including permanent and non-permanent, removable and non-removable media, can be stored by any method or technology. The information can be computer readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM) , Read-only memory (ROM), electrically erasable and programmable read-only memory (EEPROM), flash memory or other memory technologies, read-only disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette tape, magnetic tape storage or other magnetic storage devices or any other non-transmission media can be used to store information that can be accessed by computing devices. According to the definition in this article, computer-readable media does not include temporary computer-readable media (transitory media), such as modulated data signals and carrier waves. It should also be noted that the terms "include", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device that includes a series of elements includes not only those elements, but also includes Other elements not explicitly listed, or include elements inherent to this process, method, commodity, or equipment. Without more restrictions, the element defined by the sentence "include one ..." does not exclude that there are other identical elements in the process, method, commodity, or equipment that includes the element. Those skilled in the art should understand that the embodiments of this specification can be provided as methods, systems, or computer program products. Therefore, this specification may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, this manual can take the form of computer program products implemented on one or more computer usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) containing computer usable program code . This manual can be described in the general context of computer-executable instructions executed by a computer, such as a program module. Generally, program modules include processes, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present specification may also be practiced in distributed computing environments in which remote processing devices connected through a communication network perform tasks. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices. The embodiments in this specification are described in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method embodiment. The above is only an example of this specification and is not intended to limit this specification. For those skilled in the art, this specification may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this specification shall be included in the patent application scope of this specification.

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In order to more clearly explain the embodiments of the present specification or existing technical solutions, the following will briefly introduce the drawings used in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only in the specification For some of the recorded embodiments, for those of ordinary skill in the art, without paying any creative labor, other drawings may be obtained based on these drawings. FIG. 1 is a schematic flow chart of a blockchain-based product information encryption method provided in Embodiment 1; FIG. 2 is a schematic diagram of a blockchain-based product information encryption method provided in Embodiment 1; FIG. 3 is a Schematic diagram of the blockchain-based product information encryption method; FIG. 4 is a schematic flowchart of the blockchain-based product information decryption method provided in Example 2; FIG. 5 is the blockchain-based product information decryption method provided in Example 2 Schematic diagram; FIG. 6 is a schematic diagram of the blockchain-based product information decryption method provided by Example 2; FIG. 7 is a schematic flowchart of the blockchain-based product information encryption method provided by Embodiment 3; FIG. 8 is provided by Embodiment 3 Schematic diagram of the blockchain-based product information encryption method; FIG. 9 is a schematic flow diagram of the blockchain-based product information encryption method provided in Example 4; FIG. 10 is the blockchain-based product information encryption provided in Example 4 Schematic diagram of the method; FIG. 11 is a schematic flowchart of the blockchain-based product information decryption method provided in Example 5; FIG. 12 is a schematic diagram of the blockchain-based product information decryption method provided in Example 5; FIG. 13 is an embodiment 6 Provides a block diagram of a blockchain-based product information encryption device; FIG. 14 is a block diagram of a blockchain-based product information encryption device provided in Example 7; FIG. 15 is a block chain-based product information encryption device provided in Example 8 A schematic structural diagram of a device for decrypting product information; FIG. 16 is a schematic structural diagram of an electronic device according to an embodiment of the present specification.

Claims (42)

A method of product information encryption based on blockchain. The method is applied to the manufacturer and includes: one-way production encryption key based on the product's unique password; according to the production encryption key, the production information of the product Encrypt to produce production information encrypted data; Generate production information query identifier based on the production encryption key; Write production information collection to the blockchain, the production information collection contains production information query identifier and production information encrypted data. The method as described in item 1 of the patent application scope, in which the production encryption key is generated unidirectionally according to the unique password of the product, which specifically includes: receiving the production random number generated by the producer when producing the product; according to the unique password In combination with the production random number, a production encryption key is generated unidirectionally. According to the method described in item 2 of the patent application scope, the method further includes: One-way generation of a random number query identifier based on the unique password; Create a unique identifier for the product in a trusted repository; The number query identifier and the production random number are sent to the trusted repository and are all associated with the unique identifier. The method as described in item 1 of the patent application scope, wherein the production information query identifier is generated according to the production encryption key, which specifically includes: according to the production encryption key, unidirectionally generating the first circulation key, and then according to the The first circulation key is described, and the production information query mark is generated unidirectionally; then the production information collection is written into the blockchain, including: According to the first public key, the first circulation key is encrypted to generate the first circulation key Encrypted data, the first public key is the circulation public key of the first order circulation party; One-way generation of the first circulation key query identifier based on the first public key; Write production information set to the blockchain, the production The information set includes the first received key query identifier, the production information query identifier, the first received key encrypted data, and the production information encrypted data. The method as described in item 4 of the patent application scope, in which the first circulation key is encrypted according to the first public key to generate the first circulation key encrypted data, which specifically includes: the disclosure of the product based on the first public key The combination of the clear code and the first circulation key is encrypted to generate the first circulation key encrypted data. The method as described in item 4 of the patent application scope, in which the production information set is written into the blockchain, specifically including: Signing the production information set according to the production private key, the production private key is produced by the producer The private key generated when the product is mentioned; Write the signed production information set into the blockchain. A blockchain-based product information encryption method, which is applied to the circulation party, includes: One-way generation of the nth circulation key query mark based on the nth public key; Query identification based on the nth circulation key, from the block Read the nth received key encrypted data in the chain; Decrypt the nth circulation key encrypted data according to the nth private key to obtain the nth circulation key; According to the nth circulation key, generate unidirectionally The nth encryption key; According to the nth encryption key, encrypt the nth circulation information to generate the nth circulation information encrypted data; According to the nth encryption key, generate the nth circulation information query mark; The nth information The set is written into the blockchain, and the n-th information set includes the n-th circulation information query identifier and the n-th circulation information encrypted data;, where n is a natural number greater than 0. The method as described in item 7 of the patent application scope, wherein the nth encryption key is generated unidirectionally according to the nth circulation key, which specifically includes: receiving the nth random number generated by the nth order circulation party when receiving the product ; According to the combination of the nth circulation key and the nth random number, unidirectionally generate the nth encryption key. As in the method described in item 8 of the patent application scope, the method further comprises: sending the nth random number to a trusted repository and associating it with the unique identifier of the product. The method as described in item 9 of the patent application scope, wherein the nth circulation information query mark is generated based on the nth encryption key, specifically including: According to the nth encryption key, the n + 1th circulation is generated unidirectionally Key, and then generate the nth circulation information query mark unidirectionally according to the n + 1th circulation key; then write the nth information set into the blockchain, including: According to the n + 1th public key, the n + th 1. Encrypt the circulation key to generate the n + 1th circulation key encrypted data, the n + 1th public key is the circulation public key of the n + 1th circulation party; According to the n + 1th public key, it is generated unidirectionally The n + 1th circulation key query identifier; write the nth information set into the blockchain, the nth information set contains the n + 1th received key query identifier, the nth circulation information query identifier, the n + th 1 Receive key encryption data and nth circulation information encryption data. The method as described in item 10 of the patent application scope, wherein the n + 1th circulation key is encrypted according to the n + 1th public key to generate the n + 1th circulation key encrypted data, which specifically includes: according to the n + th 1 Public key, encrypt the combination of the product's public clear code and the n + 1th circulation key to generate the n + 1th circulation key encrypted data. The method as described in item 10 of the patent application scope, in which the nth information set is written into the blockchain, specifically including: sign the nth information set according to the nth private key; the signed nth information The collection is written to the blockchain. The method as described in item 7 of the patent application scope, wherein before decrypting the nth circulation key encrypted data according to the nth private key, the method further includes: according to the production public key, to the signed production information Perform signature verification on the collection; or perform signature verification on the signed nth information collection according to the nth public key. A method for decrypting product information based on blockchain. The method is applied to the purchaser and includes: One-way production encryption key is generated based on the product's unique password; Based on the production encryption key, production information query identifier is generated; according to The production information query identifier reads the production information encrypted material of the product from the blockchain; decrypts the production information encrypted material according to the production encryption key to obtain production information. The method as described in item 14 of the patent application scope, the method further comprising: unidirectionally generating the first circulation key according to the production encryption key, and unidirectionally generating the nth encryption according to the nth circulation key Key, based on the nth encryption key, generate the n + 1th circulation key in one direction; According to the nth circulation information query mark, read the nth circulation information encrypted data of the product from the blockchain; based The nth encryption key decrypts the nth circulation information encrypted data to obtain the nth circulation information; where n is a natural number greater than 0. The method as described in item 14 of the patent application scope, in which the production encryption key is generated unidirectionally according to the unique password of the product, specifically including: Uniquely generated random number query identifier based on the product's unique password; From the trusted repository Obtain the production random number corresponding to the random number query identifier; According to the combination of the unique password and the production random number, unidirectionally generate a production encryption key. The method according to item 15 of the patent application scope, wherein the nth encryption key is generated unidirectionally according to the nth circulation key, which specifically includes: acquiring the random number query key corresponding to the random number query key The nth random number; According to the combination of the nth circulation key and the nth random number, unidirectionally generate the nth encryption key,, where n is a natural number greater than 0. The method as described in Item 17 of the patent application scope, in which the encrypted information of the production information of the product is read from the blockchain, specifically including: According to the combination of the unique password and the production random number, the production is generated unidirectionally Encryption key, then unidirectionally generate the first circulation key, and then unidirectionally generate the production information query mark; According to the production information query mark, read the production information encryption data in the production information set from the blockchain; then from Reading the encrypted information of the nth circulation information of the product in the blockchain, including: According to the combination of the nth circulation key and the nth random number, generate the nth encryption key unidirectionally, and then unidirectionally Generate the n + 1th circulation key, and then generate the nth circulation information query mark unidirectionally; According to the nth circulation information search mark, read the nth circulation information encrypted data in the nth information set from the blockchain. A product information encryption device based on blockchain, the device is applied to the manufacturer and includes: a key generation unit, a data generation unit, an identification generation unit, and a data writing unit, wherein, the key generation unit, according to the product The unique password for one-way production encryption key; The data generation unit, according to the production encryption key, the production information of the product is encrypted to produce production information encryption data; The logo generation unit, according to the The production encryption key generates a production information query identifier; The data transmission unit writes the production information collection into the blockchain, and the production information collection includes the production information query identifier and production information encryption material. The device as described in item 19 of the patent application scope, wherein the key generation unit receives the production random number generated by the manufacturer when producing the product; according to the combination of the unique password and the production random number, single Generate production encryption keys. The device as described in item 20 of the patent application scope, wherein: the identification generating unit, based on the unique password, generates a random number to query the identification in one direction; the data transmission unit, is the product in the trusted repository Create a unique identifier; Send the random number query identifier and the production random number to the trusted repository, and all are associated with the unique identifier. The device according to item 19 of the patent application scope, wherein the identification generating unit generates the first circulation key unidirectionally based on the production encryption key, and then generates the production unidirectionally based on the first circulation key Information query mark; then the data generating unit encrypts the first circulation key according to the first public key to generate the first circulation key encrypted data, and the first public key is the circulation company of the first order circulation party Key; Generate the first circulation key query identifier unidirectionally according to the first public key; The data transmission unit, Write production information set to the blockchain, the production information set contains the first received key query identifier , Production information query mark, the first receiving key encryption data and production information encryption data. The device as described in item 22 of the patent application scope, wherein the data generating unit encrypts the combination of the product's public code and the first circulation key based on the first public key to generate the first circulation key encrypted data. The device as described in Item 22 of the patent application scope, wherein the data transmission unit, signs the production information set according to a production private key, which is a private key generated by the producer when producing the product Key; Write the signed production information set into the blockchain. A blockchain-based product information encryption device, which is applied to a circulation party, and includes: a logo generation unit, a data reading unit, a data analysis unit, a key generation unit, a data encryption unit, and a data transmission unit, wherein, 所The identification generating unit generates the nth circulation key query mark unidirectionally according to the nth public key; The data reading unit reads the nth reception key from the blockchain based on the nth circulation key query mark Encrypted data; The data analysis unit decrypts the nth circulation key encrypted data based on the nth private key to obtain the nth circulation key; The key generation unit based on the nth circulation key , Unidirectionally generate the nth encryption key; The data encryption unit encrypts the nth circulation information based on the nth encryption key to generate the nth circulation information encrypted data; generates the nth encryption key based on the nth encryption key n Circulation information query mark; The data transmission unit writes the nth information set to the blockchain, the nth information set contains the nth circulation information query mark and the nth circulation information encrypted data; where n is greater than 0 Natural number. The device according to item 25 of the patent application scope, wherein the key generation unit receives the nth random number generated by the nth order distributor when receiving the product; according to the nth distribution key and the nth The combination of random numbers generates the n-th encryption key in one direction. The device according to item 26 of the patent application scope, wherein the data transmission unit sends the n-th random number to a trusted repository and is associated with the unique identifier of the product. The device according to item 27 of the patent application scope, wherein the identification generating unit generates the n + 1th circulation key unidirectionally according to the nth encryption key, and then Query the identification for generating the nth circulation information; then the key generation unit encrypts the n + 1th circulation key according to the n + 1th public key to generate the n + 1th circulation key encrypted data, the The n + 1 public key is the circulation public key of the n + 1th order circulation party; the identification generation unit, according to the n + 1 public key, unidirectionally generates the n + 1 circulation key query identification; the data transmission unit , Write the nth information set into the blockchain, the nth information set includes the n + 1th received key query identifier, the nth circulation information query identifier, the n + 1th received key encrypted data, and the nth Circulated information encrypted data. The device as described in item 28 of the patent application scope, wherein the data encryption unit encrypts the combination of the product's public code and the n + 1th circulation key based on the n + 1th public key to generate the n + 1th Circulation key to encrypt data. The device of claim 28, wherein the data transmission unit signs the nth information set based on the nth private key; writes the signed nth information set into the blockchain. The device according to item 25 of the patent application scope, wherein the data analysis unit, based on the n-th private key, decrypts the n-th circulation key encrypted data, based on the production public key, the signed production information Perform signature verification on the collection; or perform signature verification on the signed nth information collection according to the nth public key. A blockchain-based product information decryption device, which is applied to the purchaser and includes: a key generation unit, an identification generation unit, a data reading unit, and a data analysis unit, wherein, the key generation unit is based on The unique password of the product, which generates the production encryption key in one direction; The identification generation unit generates the production information query identification according to the production encryption key; The material reading unit queries the identification based on the production information Read the encrypted information of the production information of the product in the blockchain; The data analysis unit decrypts the encrypted information of the production information according to the production encryption key to obtain production information. The device according to item 32 of the patent application scope, wherein: the key generation unit generates the first circulation key unidirectionally based on the production encryption key, and generates the unidirectional generation based on the nth circulation key The nth encryption key, based on the nth encryption key, generates the n + 1th circulation key in one direction; The data reading unit reads the block chain from the nth circulation information query mark The nth circulation information encrypted data of the product; The data analysis unit decrypts the nth circulation information encrypted data according to the nth encryption key to obtain the nth circulation information; where n is a natural value greater than 0 number. The device as described in item 32 of the patent application scope, in which: the key generation unit generates a random number query identifier in one direction based on the unique password of the product; the data reading unit obtains and The random number query identifier corresponds to the production random number; The key generation unit generates a production encryption key unidirectionally according to the combination of the unique password and the production random number. The device according to item 33 of the patent application scope, wherein: the data reading unit obtains the nth random number corresponding to the random number query key from a trusted storage; the key generation unit, Based on the combination of the nth circulation key and the nth random number, the nth encryption key is generated unidirectionally, where n is a natural number greater than 0. The device according to item 35 of the patent application scope, wherein: the key generation unit generates a production encryption key unidirectionally according to the combination of the unique password and the production random number, and then generates the first circulation unidirectionally The key, and then unidirectionally generate the production information query mark; The data reading unit reads the production information encrypted data in the production information set from the blockchain according to the production information query mark; then the key is generated Unit, according to the combination of the nth circulation key and the nth random number, generate the nth encryption key unidirectionally, then generate the n + 1th circulation key unidirectionally, then generate the nth circulation information query unidirectionally Mark; the data reading unit, according to the nth circulation information query mark, read the nth circulation information encrypted data in the nth information set from the blockchain. An electronic device, comprising: a processor; and a memory arranged to store computer executable instructions, the executable instructions, when executed, cause the processor to perform the following operations: one-way production based on the unique password of the product Encryption key; According to the production encryption key, encrypt the production information of the product to generate production information encryption data; According to the production encryption key, generate production information query identifier; Write production information set to the block Chain, the production information set includes production information query identifiers and production information encryption materials. An electronic device comprising: a processor; and a memory arranged to store computer-executable instructions which, when executed, cause the processor to perform the following operations: according to the n-th public key n Circulation key query mark; According to the nth circulation key query mark, read the nth received key encrypted data from the blockchain; Decrypt the nth circulation key encrypted data based on the nth private key, Obtain the nth circulation key; According to the nth circulation key, unidirectionally generate the nth encryption key; According to the nth encryption key, encrypt the nth circulation information to generate the nth circulation information encrypted data; According to the Describe the nth encryption key to generate the nth circulation information query mark; write the nth information set into the blockchain, the nth information set contains the nth circulation information query mark and the nth circulation information encryption data; where, n It is a natural number greater than 0. An electronic device, comprising: a processor; and a memory arranged to store computer executable instructions, the executable instructions, when executed, cause the processor to perform the following operations: one-way production based on the unique password of the product Encryption key; According to the production encryption key, generate production information query identifier; According to the production information query identifier, read the production information encryption data of the product from the blockchain; According to the production encryption key, Decrypt the production information encrypted data to obtain production information. A computer-readable storage medium storing one or more programs, which when executed by an electronic device including multiple application programs, causes the electronic device to perform the following operations: According to the unique password of the product, the production encryption key is generated unidirectionally; according to the production encryption key, encrypting the production information of the product to generate production information encryption data; according to the production encryption key to generate production information query Logo; Write the production information set into the blockchain, the production information set contains the production information query logo, and production information encryption data. A computer-readable storage medium storing one or more programs, which when executed by an electronic device including multiple application programs, causes the electronic device to perform the following operations: According to the nth public key, generate the nth circulation key query identifier unidirectionally; According to the nth circulation key query identifier, read the nth received key encryption data from the blockchain; According to the nth private key, Decrypt the encrypted data of the nth circulation key to obtain the nth circulation key; according to the nth circulation key, unidirectionally generate the nth encryption key; encrypt the nth circulation information according to the nth encryption key, Generate the nth circulation information encrypted data; According to the nth encryption key, generate the nth circulation information query mark; Write the nth information set into the blockchain, the nth information set contains the nth circulation information query mark and The nth circulation information encrypted data; Among them, n is a natural number greater than 0. A computer-readable storage medium storing one or more programs, which when executed by an electronic device including multiple application programs, causes the electronic device to perform the following operations: Generate the production encryption key unidirectionally according to the unique password of the product; Generate the production information query identifier according to the production encryption key; Acquire the production information encryption of the product from the blockchain according to the production information query identifier Materials; Decrypt the production information encrypted materials according to the production encryption key to obtain production information.